A-Level BiologyYear 2023Q12
page 07 12. Steps 1 to 6 describe some events that occur during meiosis. Some terms are represented by the letters J, K, L and M. 1. Chromosomes replicate to form two identical chromatids. 2. Homologous chromosomes pair up and points of contact form between J chromatids of a homologous pair. 3. K takes place to form new combinations of alleles of linked genes. 4. Chromosomes of each homologous pair attach to spindle fibres and separate to opposite poles. 5. L occurs and two daughter cells form. 6. Two daughter cells undergo further division separating M chromatids of each chromosome. Which row in the table identifies J, K, L and M? J K L M A non‑sister cytokinesis crossing over sister B sister crossing over cytokinesis non‑sister C non‑sister crossing over cytokinesis sister D sister cytokinesis crossing over non‑sister [Turn over

Paper Source:NAH_Biology_Section1_2023.pdf
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Exam Specification Info
This question is part of the UK A-Level Biology syllabus. In the actual exam, structured questions typically require linking specific keywords to gain full marks. Applaa helps you drill these topics.
Syllabus levelAdvanced Level (A-Level)
SubjectBiology
Official MarksVariable (2–6 marks)